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Finding the Fourth Proportional to 79,750.40, 119,625.60 and 76,688.60

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Solution

The fourth proportional to 79,750.40, 119,625.60 and 76,688.60 is: 115,032.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,750.40 : 119,625.60 = 76,688.60 : x
  2. Step 2: Convert to fraction form
    79,750.40/119,625.60 = 76,688.60/x
  3. Step 3: Cross multiply
    79,750.40x = 119,625.60 × 76,688.60
  4. Step 4: Simplify right side
    79,750.40x = 9,173,919,788.16
  5. Step 5: Solve for x
    x = 9,173,919,788.16/79,750.40
  6. Step 6: Final answer
    x = 115,032.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.